scholarly journals PENGARUH WARNA WADAH BERBEDA TERHADAP PERTUMBUHAN NANNOCHLOROPSIS SP

2020 ◽  
Vol 3 (1) ◽  
pp. 15-18
Author(s):  
Nur Achmad Saputra ◽  
A. Gusti Tantu ◽  
Machuluddin Amin ◽  
Dahlifa Dahlifa ◽  
Sutia Budi
Keyword(s):  
Oxygen Content ◽  
Phytoplankton Growth ◽  
Physical Factors ◽  
Phosphate Nitrate ◽  
Chemical Factors ◽  
Culture Container

Pertumbuhan fitoplankton dipengaruhi oleh beberapa faktor fisika seperti suhu, cahaya matahari, kedalaman, kekeruhan, salinitas, dan kandungan oksigen, faktor kimia seperti pH, fosfat, nitrat, nitrit, dan silikat serta warna wadah kultur. Tujuan penelitian untuk mengetahui pengaruh warna wadah terhadap pertumbuhan Nanochloropsis sp. Penelitian didesain menggunakan Rencana Acak Lengkap (RAL). Perlakuan yang diuji adalah penggunaan wadah kultur yang memiliki warna berbeda dengan empat perlakuan dan tiga kali ulangan. Warna wadah yang digunakan adalah merah, kuning, biru dan bening. Hasil penelitian menunjukkan penggunaan warna wadah berpengaruh nyata terhadap pertumbuhan Nannochloropsis sp. Warna wadah terbaik untuk pertumbuhan Nannochloropsis sp. adalah bening. Phytoplankton growth is influenced by several physical factors such as temperature, sunlight, depth, turbidity, salinity, and oxygen content, chemical factors such as pH, phosphate, nitrate, nitrite, and silicate as well as the color of the culture container. The purpose of the study was to determine the effect of container color on the growth of Nanochloropsis sp. The study was designed using a Completely Randomized Plan (CRD). The treatment tested was the use of culture containers that had different colors with four treatments and three replications. The color of the container used is red, yellow, blue and clear. The results showed that the use of container color significantly affected the growth of Nannochloropsis sp. The best container color for the growth of Nannochloropsis sp. is clear.

Further Studies upon Chemical Factors Affecting the Breeding of Anopheles in Trinidad

1934 ◽  
Vol 25 (4) ◽  
pp. 491-494 ◽  
Author(s):  
P. A. Buxton
Keyword(s):  
Analytical Study ◽  
Chemical Constituents ◽  
Physical Factors ◽  
Factors Affecting ◽  
Early Stages ◽  
Freshwater Biology ◽  
Chemical Technique ◽  
Chemical Factors ◽  
Physical And Chemical

During the last decade, entomologists have made progress in understanding the environment in which certain insects live; in particular, we begin to understand the effect of certain physical and chemical factors, which make up a part of the environment. With this gain in knowledge, it is sometimes possible to forecast outbreaks of insects and of diseases conveyed by them, and one can sometimes say that a particular alteration of the environment will result in loss or gain. But so far as mosquitos are concerned, one must admit that though much work has been devoted to the analytical study of the water in which the early stages are passed, the results are disappointing. A consideration of the published work suggests several reasons for this. Investigation into the ecology of the mosquito has had a vogue, and much of it has been done by workers who were isolated and whose knowledge of chemical technique and freshwater biology was limited. Apart from that, the inherent difficulties are great, for the worker must hunt for the limiting chemical and physical factors among a host of others which are doubtless unimportant, and there are few clues to indicate which of the chemical constituents of the water affects the mosquito. The data are therefore voluminous and it is difficult to reduce them to order and present them so that they can be readily understood.

How to detect occupational diseases associated with the exposure to chemical factors

2020 ◽  
pp. 26-35
Author(s):  
Sergey Babanov
Keyword(s):  
Urinary Tract ◽  
Occupational Diseases ◽  
Educational Institution ◽  
Physical Nature ◽  
Federal State ◽  
Physical Factors ◽  
Ministry Of Health ◽  
Production Factors ◽  
Chemical Factors ◽  
Medical University

Diseases of the kidneys and urinary tract, primarily of toxic and chemical etiology, constitute a large proportion of occupational diseases. Various production factors of both chemical and physical nature can cause the development of nephropathies. Sergey Babanov, Doctor of Medicine, Professor, Head of the Department of occupational diseases and clinical pharmacology at the Federal State-Funded Educational Institution of Higher Education Samara State Medical University of the Ministry of Health of the Russian Federation, chief freelance specialist in occupational pathology at the Ministry of Health of the Samara region, speaks about occupational diseases of the kidneys and urinary tract associated with the exposure to chemical and physical factors.

Effect of Blood Viscosity on Thrombosis Potential Near a Step Wall Transition

2009 ◽  
Author(s):  
Scott C. Corbett ◽  
Amin Ajdari ◽  
Ahmet U. Coskun ◽  
Hamid N.-Hashemi
Keyword(s):  
Blood Flow ◽  
Vessel Wall ◽  
Coagulation Factors ◽  
Artificial Organs ◽  
Physical Factors ◽  
Local Geometry ◽  
Induce Platelet Aggregation ◽  
Shear Rates ◽  
Chemical Factors ◽  
Low Shear

Thrombosis and hemolysis are two problems encountered when processing blood in artificial organs. Physical factors of blood flow alone can influence the interaction of proteins and cells with the vessel wall, induce platelet aggregation and influence coagulation factors responsible for the formation of thrombus, even in the absence of chemical factors in the blood. These physical factors are related to the magnitude of the shear rate/stress, the duration of the applied force and the local geometry. Specifically, high blood shear rates (or stress) lead to damage (hemolysis, platelet activation), while low shear rates lead to stagnation and thrombosis [1].

Keanekaragaman dan Kelimpahan Semut sebagai Predator Hama Tanaman Padi di Lahan Sawah Organik dan Anorganik Kecamatan Karanganom Kabupaten Klaten

2018 ◽  
Vol 19 (2) ◽  
pp. 125 ◽  
Author(s):  
Siska Lesiana Adhi ◽  
Mochamad Hadi ◽  
Udi Tarwotjo
Keyword(s):  
Insect Pests ◽  
Organic Matter Content ◽  
Rice Fields ◽  
Physical Factors ◽  
Sugar Solution ◽  
Soil Arthropods ◽  
Solenopsis Geminata ◽  
Organic Rice ◽  
High Soil ◽  
Chemical Factors

Ants potentially as predators that become natural enemies of insect pests in rice fields with paddy cultivation. This study aims to know the diversity and abundance of ants, the role of ants, the population of ants, and the influence of physical and chemical factors in organic and inorganic rice fields. The ants were collected using pit fall trap method with insect bait, fish meat, and sugar solution. The results showed that the number of species and the number of individuals in organic rice fields was higher (429 individuals, 11 species) than inorganic rice fields (193 individuals, 10 species). In general, the index of diversity in organic rice fields was higher (ranging from 0.73 to 1.65) compared to inorganic rice fields (ranging from 0 to 1.28). The index of evenness in organic rice fields ranged from 0.63 to 0.99 (evenly distributed), whereas in inorganic rice fields ranged from 0 to 0.99 (uneven until evenly distributed). The dominant ants in organic rice fields were Camponotus sp, Solenopsis geminata, Anoplolepis gracilipes, and Paratrechina longicornis, whereas in the inorganic rice fields were Tapinoma sp, Solenopsis geminata, and Camponotus sp. The index of similarity between organic and inorganic rice fields showed a high and very high degree of similarity based on the type of feed. Physical factors of high soil and air humidity environment, high soil and air temperature increased the diversity and abundance of ants in the rice fields ecosystem. Factors soil pH in accordance with the growth of soil Arthropods were neutral or slightly acidic. Chemical factors of organic matter content, Nitrogen (N), the content of C organic, and a high P total content increased the diversity and abundance of ants. Keywords: diversity and abundance, ants, organic and inorganic rice fields

Influence of Mechanical and Chemical Factors on Transition Between Severe and Mild Wear in Saline Solution

1997 ◽  
Vol 119 (4) ◽  
pp. 619-625 ◽  
Author(s):  
H. Goto
Keyword(s):  
Dissolved Oxygen ◽  
Oxygen Content ◽  
Cathodic Protection ◽  
Saline Solution ◽  
Concentration Level ◽  
Applied Potential ◽  
Severe Wear ◽  
Saturated Condition ◽  
Mild Wear ◽  
Chemical Factors

Pin-on-disk wear tests of carbon steels in saline solution were carried out at high loads to study the effects of mechanical and chemical factors on the transition between severe and mild wear. The factors were load, presliding time, concentration of saline solution, dissolved oxygen content, and applied potential for cathodic protection. Severe wear and seizure appear at low concentration levels of saline solution and the transition takes place at a certain concentration level of saline solution. The concentration level for the transition is higher under argon-saturated condition than under air-saturated condition. Mild wear is predominant over the whole range of dissolved oxygen content from 0.5 to 18 ppm in 0.5 wt percent saline solution and the wear rate decreases with decreasing dissolved oxygen content. The mild wear occurs in the range from 2 to 18 ppm in 0.01 wt percent saline solution, whereas the wear mode moves to severe wear below 2 ppm. Mild wear predominates under incomplete cathodic protection between −0.50 and −0.80 V (versus Ag/AgCl in 0.5 wt percent saline solution. The applied potential for the transition from initial to steady wear is more negative under higher dissolved oxygen content condition. Complete severe wear occurs below −0.90 V (versus Ag/AgCl) with a risk of seizure.

scholarly journals Macrozoobenthos With Chemical and Physics factor in the Babura rivers Deli Serdang

2016 ◽  
Vol 1 (2) ◽  
pp. 44
Author(s):  
Masdiana Sinambela ◽  
Mariaty Sipayung
Keyword(s):  
Dissolved Oxygen ◽  
Abiotic Factors ◽  
Measured Parameter ◽  
Physical Factors ◽  
Biotic Factors ◽  
Still Life ◽  
Ex Post ◽  
Physico Chemical ◽  
Ex Post Facto ◽  
Chemical Factors

Research Title “Macrozoobenthos with physico-chemical factors on water and river Babura Deli Serdang”. The measured parameter is existence of macrozoobenthos That biotic factors and abiotic factors ie chemical and physical factors. Physical factors ie: temperature, turbidity, dan chemical factors ie factors: pH, Dissolved Oxygen (DO), dan BOD, COD, and fosfat.  Macrozoobenthos were taken using a Surber net in Mei 2015, there are 2 station.  Where with number of macrozoobenthos in the river Babura 12 individu ie : 1 sp in station 1 ie Melanoides sp and 4 sp in station 2 ( 12 individu) ie Melanoides sp 2 individu, Hetelimnius sp 1 individu, Elmidae 2 individu, Epicordulia sp 1 individu, Chironomus sp 4  Melanoides 2 sp, dan Dragonfly nymph 4 individu. Chemical and physical factors still life macrozoobenthos support. An ex post facto research initials, it can  use as baseline.   Keywords: existence, macrozoobenthos, factor  physic, chemistry

scholarly journals Hygienic assessment of the complex of physical and chemical factors affecting a person in rooms of the different purpose in in-patients medical institutions

2021 ◽  
Vol 100 (6) ◽  
pp. 546-554
Author(s):  
Nikolay V. Rusakov ◽  
Natalia V. Kalinina ◽  
Elena B. Gaponova ◽  
Mikhail Ye. Goshin ◽  
Ilya M. Banin
Keyword(s):  
Primary Source ◽  
Hospital Environment ◽  
Physical Factors ◽  
Natural Light ◽  
Artificial Light ◽  
Radiation Level ◽  
Factors Affecting ◽  
Medical Institutions ◽  
Chemical Factors ◽  
Physical And Chemical

Introduction. The paper presents the hygienic assessment of the complex physical and chemical factors affecting patients and staff in the different premises of institutional medical organizations. Material and methods. The comprehensive hygienic assessment of the internal environment of medical institutions was based on three in-patient medical institutions (IMI). The research objects were medical wards, operating rooms, treatment rooms, dressing rooms, physiotherapy rooms, laboratory and diagnostic rooms, utility rooms. The study included measurements of the following parameters: microclimate, noise, electromagnetic fields level in different frequency ranges, ion regime, assessment of natural light, artificial light, insolation, gamma radiation level, measurements of concentrations of carbon dioxide, oxygen, ozone, radon, mercury vapor, and volatile organic compounds. Results. It is shown that in the hospital environment, a person is affected by complex physical factors. Microclimatic parameters are one of the most significant factors in the hospital environment that require constant monitoring. The control of the given factor is exceptionally substantial in IMI buildings that are not equipped with in-patients an air conditioning system. The highest noise levels were found in physiotherapy rooms and diagnostic rooms. The primary source of noise in medical rooms is working equipment, inwards - conversational speech. Both patients and medical workers were established to receive the main electromagnetic load in diagnostic rooms, laboratory rooms, and physiotherapy rooms. The assessment of the light environment showed that each of the examined rooms was provided with a sufficient level of natural light, and the duration of insolation in the treatment rooms corresponded to hygienic requirements. The highest levels of artificial light were in rooms with led lights. In the air of the examined rooms, light ions of both polarities were either absent, or their content was below the minimum required concentration. Higher concentrations of organic acids and chlorine-containing compounds were found in the surveyed premises of IMO compared to the air in other public buildings. The highest concentration of chemical compounds in the air was observed in wards and diagnostic rooms. Conclusion. The need for regular monitoring of physical and chemical factors affecting patients and staff in IMI is justified. A list of physical factors for carrying out risk-oriented control in hospital premises, taking into account their functional purpose, is required.

scholarly journals Factors Enhancing Virulence Response of Agrobacteria in Cucumber (Cucumis sativus L.)

2010 ◽  
pp. 72-81
Author(s):  
AKM Mohiuddin ◽  
Zaliha C Abdullah ◽  
MKU Chowdhury ◽  
K Harikrishna ◽  
Suhaimi Napis
Keyword(s):  
Light Intensity ◽  
Cucumis Sativus ◽  
Hairy Roots ◽  
Tissue Type ◽  
Physical Factors ◽  
Wild Type ◽  
Agrobacterium Strain ◽  
Cucumis Sativus L ◽  
Chemical Factors ◽  
Physical And Chemical

The virulence response of five wild type Agrobacterium tumefaciens (tumorigenic) strains and five wild type A. rhizogenes (oncogenic) strains was studied in cucumber (Cucumis sativus L.), cv. Spring Swallow. Several physical and chemical factors e.g. Agrobacterium strains, tissue type (stem and petiole tissues), light intensity, dark incubation, concentrations of acetosyringone (a phenolic compound) were tested. The virulent response of Agrobacteria was found to be depend on plant tissue type, Agrobacterium strain, tissue-Agrobacterium interaction and both chemical-physical factors. Specific light intensity, 2500-lux, as well as the acetosyringone concentration, 20-mM, played important role in virulence response. Among the different strains, LBA 4404 and 15834 were highly virulent to cucumber compared to the other strains tested. A. tumefaciens strains A348 and A281 were failed to initiate crown galls in both stem and petiole tissues, however, in the presence of acetosyringone they produced crown galls. Similarly, A. rhizogenes strain A4 initiated hairy roots in the presence of acetosyringone. All developed crown galls and hairy roots showed an autonomous growth on a hormone free medium containing cefatoxime. Thus, enhancement of virulence response was not only dependent on Agrobacterium strains, but also on particular physical and chemical factors also play vital role.

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